Results 61 to 70 of about 415,122 (294)

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

A domain adaptation‐based convolutional neural network incorporating data augmentation for power system dynamic security assessment

The Journal of Engineering
Recently, deep learning (DL) based dynamic security assessment (DSA) methods have been very successful. However, although a DSA model can be trained well for a specific topology, it often does not perform well for other topologies.
Sasan Azad, Mohammad Taghi Ameli
doaj   +1 more source

Impact of the power-controlled static synchronous machine on transient stability of power system

Frontiers in Energy Research
Compared with the grid-following (GFL)-converter-interfaced generations (CIG), the power-controlled static synchronous machine (PCSSM) can realize voltage and frequency control through the power tracking function, which has the potential to improve the ...
Liu Qing, Zhang Zheren, Xue Yicheng, Xu Zheng   +3 more
doaj   +1 more source

Artificial Intelligence Techniques for Power System Transient Stability Assessment

Energies, 2022
The high penetration of renewable energy sources, coupled with decommissioning of conventional power plants, leads to the reduction of power system inertia. This has negative repercussions on the transient stability of power systems.
Petar Sarajcev, Antonijo Kunac, Goran Petrovic, Marin Despalatovic   +3 more
doaj   +1 more source

Power system transient stability assessment based on quadratic approximation of stability region [PDF]

, 2005
This paper presents an approach to estimate the Critical Clearing Time (CCT) of the multi-machine power systems based on the quadratic surface which approximates the boundary of stability region relating to the controlling unstable equilibrium point.
Lu, Q, Mei, S, Ni, Y, Wu, FF, Xue, A
core   +1 more source

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Transient Stability Assessment Method for Multi-machine Power Systems Considering Dense Channels

Zhongguo dianli
To improve the accuracy and efficiency of power system transient stability assessment, a transient stability assessment method for multi-machine power system considering dense channel based on deep transfer is proposed. Firstly, a new transient stability
Xuejun WANG, Shuiping FANG, Guangyong CHI   +2 more
doaj   +1 more source

Stability of Power Grids: State-of-the-art and Future Trends [PDF]

EPJ Web of Conferences, 2019
The state of the art of transient stability and steady-state (small signal) stability in power grids are reviewed. Transient stability concepts are illustrated with simple examples; in particular, we consider two machine learning-based methods for ...
Tomin Nikita, Panasetsky Daniil, Iskakov Alexey   +2 more
doaj   +1 more source

A new method of transient stability assessment in power systems using LS-SVM [PDF]

, 2007
This paper presents transient stability assessment of electrical power system using least squares support vector machine (LS-SVM) and principle component analysis.
Abdul Wahab, Noor Izzri, Mohamed, Azah, Yahya, Iskandar   +2 more
core   +1 more source